Matrix-holding device for filling teeth.



No. 776.718. PATENTBD DBO. 1904.

I 0. M. BEAM.

MATRIX HOLDING EEvmE EOE FILLING TEETH.

APPLICATION FILED APR. 2, 1904.

NO MODEL.

WITNESSES: INVENTOR (2 Q Zefomey N0. 776,718. Patented December 6,1904:.

TTED STATES PATENT CALVIN MIGHAUX BEAM, OF SHELBY, NORTH CAROLINA.

MATRIX-HOLDING DEVICE FOR FILLING TE ETl""ll..

SPECIFICATION forming part of Letters Patent No. 776,718, dated December6, 1904,.

Application filed April 2, 1904:. Serial No. 201,314. (No model.)

view of one of the matrix-engaging members To (all whom it may concern:

Be itkuown that I, CALVIN MIoHAUX BEAM, of the invention, and Fig. 6 isa detail view a citizen of the United States, residing at showing themanner of attachment of one end Shelby, in the county of Cleveland andState of thematriX-strip to the screw-carrying memof North Carolina,have invented certain new ber.

and useful Improvements in Matrix-Holding Reference now being had to thedetails of Devices for Filling Teeth; and I do declare the drawings byletter, A and B designate, rethe following to be a full, clear, andexact despectively, a second bicuspid and a first molar scription of theinvention, such as will enable having the mesial and distal surfacesthereof IO others skilled in the art to which it appertains decayed, andin applying my dental matrix to make and use the same, reference beinghad devices or holders for the treatment of said to the accompanyingdrawings, and to the letteeth for filling and building up the same Iters of reference marked thereon, which form provide two matrix stripssimilar in cona part of this specification. struction and eachdesignated by letter C.

5 This invention relates to new and useful im- Said matrix-strips may beeasily made by the 5 provements in a combination of holding dcoperatorto suit individual cases and of any vices for dental matrices for use infilling suitable metal,such as German silver or steel, teeth; and theobject of the invention is to and must be thin enough to be easilypassed produce a universal posterior and anterior between the teeth tobe filled.

2O matrix-holder which may with aid of matriX- Referring to Fig. 1 ofthe drawings,'two 7 strip be conveniently and readily applied tomatrix-holding devices are illustrated, right teeth having various formsof cavities thereand left,(designated by letters 1) and D.) Said in,whereby the same may be properly filled members are formed, preferably,of steel, the and the teeth built up. arms of which are angled, comingfrom 5 My invention consists in various details of threaded and swivelscrew connection about construction and in combinations andarrangeone-twentieth inch, turning downward about ments of parts, whichwill be hereinafter fully one-third inch, and are rounded atcorredescribed and then specifically defined in the spending ends, and alongitudinal slit (Z is appended claim. formed in each member for thereception of 3 My invention is illustrated in the accornone end of a1natrixstrip, and a suitable wire panying drawings, which, with theletters of E orother fastening device is passed through reference markedthereon, form a part of this registering apertures in the shank portionsof application, and in which drawings similar letsaid members and in thematrix-strips, whereters of reference indicate like parts in the by theends of the strips maybe securely fas- 35 views, in which tened to saidmembers. The outer angled 5 Figure 1 is a perspective view showing myends of the members D, which extend rearinvention with matrix-strip asapplied to a hiward and in opposite directions, are provided cuspid andfirst molar having their Inesial and with apertures (Z, the inner wallsof which distal surfaces decayed. Fig. 2 is a perspecapertures arethreaded and adapted to receive 4 tive view showing one side of a1natrix-holdthe screws F, and each of the matrix-holding 9 ing devicewith strip or prepared matrix as members 1) is also apertured, as at (Zand. applied when the lingual surface of the right each is adapted toreceive a portion of one of upper incisor is decayed. Fig. 3 is apersaid screws which has swivel connection therespective view showingamatrix-strip held by with. One end of each of said screws is 45 amatrix-holding device and surrounding a squared in order to perinitawrench to be apmolar in which the lingual side of the same is pliedthereto for the purpose of rotating the decayed. Fig. 4: is a detailview of a matrixscrew in one direction or another, accordingly stripbefore having its ends turned to form as it may be desired to cause theends of the rolls or perforated corresponding with registwo matrices,which are positioned as shown 5 tering apertures in shank. Fig. 5 is adetail in the drawings, to be forced away from each other or togetherfor the purpose of holding the matrix-strips about a portion of theadjacent faces of the teeth which are being treated.

Referring to Fig. 2 of the drawings will be seen the application of oneof my matrixholding devices and a prepared strip as employed when alingual surface of the right upper incisor is decayed. In thisapplication of my invention I show a slight modification in the mannerof applying one of the holding devices for holding the strips adjacentto the tooth, and the modification consists in turning the ends of thestrip into cylindrical rolls C, and in this modification the shankportions K i of the strip-holding members are adapted to enter saidrolls, and the ends of the strips may be held in the cylindrical rollsby means of solder or other fastening mechanism.

Referring to Fig. 3 of the drawings, I have illustrated the applicationof one of my matrix-holding devices and a prepared strip in connectionwith a molar in which the lingual side thereof is gone, and in said Fig.3 the matrix-strip is passed about the tooth and the ends of the stripare turned into rolls which are engaged by the shank portions of thematrix-strip-holding device and a screw which is swiveled to one memberengages threaded walls in the aperture of the other member.

Letter N designates a tooth where only the buccal and lingual walls ofthe bicuspid are left, and in applying my invention to treat a tooth ofthis kind it is better to place two strips of the matrix around thetooth instead of between the same, as illustrated in Fig. 1, and byturning the screw in the reverse direction the strips may be securelyheld to the tooth.

By the provision of my invention or the apparatus shown and described itwill be observed that I produce simple and eflicient matrix-holdingdevices which may securely hold the matrix-strip, and by the applicationof the screws one or more strips may be held about the tooth to betreated, and by the employment of a wrench the strips may be easily andquickly adjusted,and by the construction illustrated the matrix-stripholders will not interfere with the movements of the operator intreating the teeth to which the matrices are applied.

While I have shown certain forms of ma trix-strips for application todifferent teeth, it will be understood that many other forms may be madeas may be found necessary in the treatment of teeth located in differentpositions and having cavities positioned at different locations in thetooth, as the object of this invention for holding the matrix-strips isthat the operator is enabled to construct his matrices in shape, width,and length to suit each individual case where a dental matrix is used.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is I A dental matrix-holdingapparatus comprising two separate matrix-holding members, each having acurved end with a longitudinal slot therein, and apertured bosses at theopposite ends of said members, a matrix, the ends of which pass throughsaid slots, means for fastening said matrix to the members, one of saidbosses being interiorly threaded, a screw swiveled in one of said bossesand having threaded connection with the other, as set forth.

In testimony whereof I hereunto aflix my signature in presence of twowitnesses.

CALVIN MIUHAUX BEA. lVitnesses:

GEO. B. SAN'roN, L. LGIDNEY.

